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GUSMÃO, R. SOFER, Z. LUXA, J. PUMERA, M.
Original Title
Antimony Chalcogenide van der Waals Nanostructures for Energy Conversion and Storage
Type
journal article in Web of Science
Language
English
Original Abstract
Among van der Waals nanomaterials, topological insulators such as antimony chalcogenides (Sb2X3, X = S, Se, Te) have interesting thermoelectric and optical properties. Expressly, Sb2S3 is regarded as a favorable anode material for batteries owing to its predicted specific capacity. Both Sb2S3 and Sb2Se3 have an isomorphous tubular one-dimensional (1D) crystal structure, whereas Sb2Te3 has a two-dimensional (2D) layered structure. The synthesized bulk crystals of Sb2X3 were submitted to liquid-phase shear force exfoliation. The 1D and 2D Sb2X3 undergo downsizing processes, also complemented by delamination, to submicron sheets and with an average thickness down to 37 nm. The inherent electrochemical and heterogeneous electron transfer properties of the materials were first studied. Exfoliated Sb2S3 had the best performance for the hydrogen evolution reaction in a wide pH range, with improvements in the overpotential of up to 500 mV, with respect to the starting material. Specifically, in acidic media, exfoliated Sb2S3 also has a good stability for multiple cycles and continuous operation. Likewise, exfoliated Sb2S3 had the highest gravimetric capacitive behavior in alkaline solution.
Keywords
layered materials; topological insulator; shear-force exfoliation; water splitting; electrochemical capacitor
Authors
GUSMÃO, R.; SOFER, Z.; LUXA, J.; PUMERA, M.
Released
16. 9. 2019
ISBN
2168-0485
Periodical
ACS Sustainable Chemistry and Engineering
Year of study
7
Number
18
State
United States of America
Pages from
15790
Pages to
15798
Pages count
9
URL
https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.9b04415
BibTex
@article{BUT159843, author="Rui {Gusmão} and Zdeněk {Sofer} and Jan {Luxa} and Martin {Pumera}", title="Antimony Chalcogenide van der Waals Nanostructures for Energy Conversion and Storage", journal="ACS Sustainable Chemistry and Engineering", year="2019", volume="7", number="18", pages="15790--15798", doi="10.1021/acssuschemeng.9b04415", issn="2168-0485", url="https://pubs.acs.org/doi/abs/10.1021/acssuschemeng.9b04415" }